... political instabilities with fighting and violence overlap into Chad and Central African Republic, leaving refugees and rebel groups in both countries; Chadian Aozou rebels reside in southern Libya; Lake Chad Commission continues to urge signatories Cameroon, Chad, Niger, and Nigeria to ratify delimitation treaty over lake region, which remains the site of armed clashes among local populations ... — The 2003 CIA World Factbook • United States. Central Intelligence Agency